﻿using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234237

namespace MetroApp.Views
{
    /// <summary>
    /// A basic page that provides characteristics common to most applications.
    /// </summary>
    public sealed partial class ScrollViewerDemo : MetroApp.Common.LayoutAwarePage
    {
        public ScrollViewerDemo()
        {
            this.InitializeComponent();
            this.Loaded += ScrollViewerDemo_Loaded;
        }

        void ScrollViewerDemo_Loaded(object sender, RoutedEventArgs e)
        {
            VisualStateGroup group = FindVisualState(this.TestScrollViewer, "ScrollStates");
            //group.CurrentStateChanging += group_CurrentStateChanging;
            //visualStateGroup.CurrentStateChanging += new EventHandler<VisualStateChangedEventArgs>(this.OnScrollingStates_StateChanging);
            //VisualStateGroup visualStateGroup2 = visualStateGroups.get_Item(1) as VisualStateGroup;
            //visualStateGroup2.CurrentStateChanging += new EventHandler<VisualStateChangedEventArgs>(this.OnVerticalCompressionStates_StateChanging);
            //VisualStateGroup visualStateGroup3 = visualStateGroups.get_Item(2) as VisualStateGroup;
            //visualStateGroup3.CurrentStateChanging += new EventHandler<VisualStateChangedEventArgs>(this.OnHorizontalCompressionStates_StateChanging);
        }

        void group_CurrentStateChanging(object sender, VisualStateChangedEventArgs e)
        {
            Debug.WriteLine(e.NewState.ToString());   
        }


        private VisualStateGroup FindVisualState(FrameworkElement element, string name)
        {
            if (element == null)
                return null;

            IList<VisualStateGroup> groups = VisualStateManager.GetVisualStateGroups(element);
            foreach (VisualStateGroup group in groups)
                if (group.Name == name)
                    return group;

            return null;
        }

     
        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="navigationParameter">The parameter value passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
        /// </param>
        /// <param name="pageState">A dictionary of state preserved by this page during an earlier
        /// session.  This will be null the first time a page is visited.</param>
        protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
        {
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="pageState">An empty dictionary to be populated with serializable state.</param>
        protected override void SaveState(Dictionary<String, Object> pageState)
        {
        }
    }
}
